James Jordan Buck, also known as JJ or JayJay, is a little boy who became famous online because of something really cool that happened to him. One day, JJ's dad took a picture of him holding a Nintendo Switch, which is a special video game console that you can play both at home and on the go.
The picture was so cute that JJ's dad posted it on Twitter with the caption, "Can we get a retweet for my boy JJ who has been battling leukemia for almost 3 years now?" In the tweet, JJ's dad also said that JJ loves playing video games but can't really leave the hospital to do so.
Well, the tweet went viral, which means that lots and lots of people saw it and shared it with their friends. Even some really famous people like Mark Hamill, the actor who played Luke Skywalker in Star Wars, retweeted it! People from all over the world started sending JJ video games and other cool stuff to keep him entertained while he's in the hospital.
But it didn't stop there. Some really amazing people even raised money to help JJ's family pay for his medical bills! In just a few days, they raised over $50,000. That's a lot of money!
So now, JJ has all kinds of fun stuff to play with in the hospital, and his family doesn't have to worry as much about how they're going to pay for his treatments. All because of one cute picture and a lot of really kind people who wanted to help make JJ's life a little bit easier.